Recent fluorination strategies in solid electrolytes for high-voltage solid-state lithium-ion batteries

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-03-07 DOI:10.1007/s12598-025-03244-8

An-Chun Tang, Er-Hai Hu, Bei-Er Jia, Chu-Bin Wan, Zi-Yue Wen, Shuen Tso, Xin Ju, Qing-Yu Yan

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Abstract

High-voltage solid-state lithium-ion batteries (SSLIBs) have attracted considerable research attention in recent years due to their high-energy-density and superior safety characteristics. However, the integration of high-voltage cathodes with solid electrolytes (SEs) presents multiple challenges, including the formation of high-impedance layers from spontaneous chemical reactions, electrochemical instability, insufficient interfacial contact, and lattice expansion. These issues significantly impair battery performance and potentially lead to battery failure, thus impeding the commercialization of high-voltage SSLIBs. The incorporation of fluorides, known for their robust bond strength and high free energy of formation, has emerged as an effective strategy to address these challenges. Fluorinated electrolytes and electrode/electrolyte interfaces have been demonstrated to significantly influence the reaction reversibility/kinetics, safety, and stability of rechargeable batteries, particularly under high voltage. This review summarizes recent advancements in fluorination treatment for high-voltage SEs, focusing on solid polymer electrolytes (SPEs), inorganic solid electrolytes (ISEs), and composite solid electrolytes (CSEs), along with the performance enhancements these strategies afford. This review aims to provide a comprehensive understanding of the structure–property relationships, the characteristics of fluorinated interfaces, and the application of fluorinated SEs in high-voltage SSLIBs. Further, the impacts of residual moisture and the challenges of fluorinated SEs are discussed. Finally, the review explores potential future directions for the development of fluorinated SSLIBs.

Graphical abstract

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高压固态锂离子电池固体电解质氟化策略研究进展

高压固态锂离子电池（SSLIBs）由于其高能量密度和优越的安全性，近年来引起了广泛的研究关注。然而，高压阴极与固体电解质（SEs）的集成面临着多重挑战，包括自发化学反应形成高阻抗层、电化学不稳定、界面接触不足和晶格膨胀。这些问题严重影响了电池性能，并可能导致电池故障，从而阻碍了高压sslib的商业化。氟化物的结合以其强大的结合强度和高自由形成能而闻名，已成为解决这些挑战的有效策略。氟化电解质和电极/电解质界面已被证明对可充电电池的反应可逆性/动力学、安全性和稳定性有显著影响，特别是在高压下。本文综述了高压电解液氟化处理的最新进展，重点介绍了固体聚合物电解质（spe）、无机固体电解质（ISEs）和复合固体电解质（cse），以及这些策略所带来的性能提升。本文综述了含氟硅树脂的结构-性能关系、含氟界面特性以及在高压sslib中的应用。此外，还讨论了残留水分的影响和氟化se面临的挑战。最后，对氟化sslib的未来发展方向进行了展望。图形抽象

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.